TST: try immediate return instead of deep copy

Author: AlexKirko

pandas/conftest.py

@@ -444,19 +444,18 @@ def index_with_missing(request):
     """
     if request.param in ["int", "uint", "range", "empty", "repeats"]:
         pytest.xfail("missing values not supported")
-    ind = indices_dict[request.param].copy(deep=True)
+    ind = indices_dict[request.param].copy()
     vals = ind.values
     if type(vals[0]) == tuple:
         # For setting missing values in the top level of MultiIndex
         vals = ind.tolist()
         vals[0] = tuple([None]) + vals[0][1:]
         vals[-1] = tuple([None]) + vals[-1][1:]
-        ind = MultiIndex.from_tuples(vals)
+        return MultiIndex.from_tuples(vals)
     else:
         vals[0] = None
         vals[-1] = None
-        ind = type(ind)(vals)
-    return ind
+        return type(ind)(vals)
 
 
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